<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
  <h2>{{fullName}}</h2>
</div>

<script src="../js/vue.js"></script>
<script>
    const  app = new Vue({
      el:'#app',
      data:{
        message: '卢本伟牛逼！',
        firstName: '莫',
        lastName: '偿命'
      },
      computed: {
        // fullName: function () {
        //    return this.firstName + ' ' + this.lastName
        // }

        fullName: {
          // set: function (newValue) {
          //   // 一般不实现，所有可以删除
          // },
          get: function () {
            return this.firstName + ' ' + this.lastName
          }


        }

      }
    })
</script>
</body>
</html>